"""自定义的异常捕获方法"""
import logging

from django.db import DatabaseError
from redis import RedisError
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import exception_handler

logger = logging.getLogger('django')


def db_exception_handler(exc, context):
    """
    自定义异常处理方法
    :param exc: 异常
    :param context: 抛出异常的上下文
    :return: Response 响应对象
    """
    # 调用rest_frame原生的异常处理方法
    response = exception_handler(exc, context)

    if response is None:
        view = context['view']
        if isinstance(exc, DatabaseError) or isinstance(exc, RedisError):
            # 数据库异常处理
            logger.error('[%s]:%s' % (view, exc))
            response = Response({'message': '服务器内部错误'}, status=status.HTTP_507_INSUFFICIENT_STORAGE)
        else:
            logger.error('[%s]:%s' % (view, exc))
            response = Response({'message': '未知错误'}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)

    return response
